US4150003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer dispersion process
Assignee: Millennium Petrochemicals Inc
•
Filing: 1977-08-15
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Granted: 1979-04-17
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Expires: 1997-08-15
Abstract
Abstract A process for forming dispersions of ethylenevinyl acetate copolymers using an alkali metal soap of higher carboxylic acids as dispersing agent.
Inventors
- 👤 Dorothee M. McClain
- 👤 John Hoyt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:31
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
A process for dispersing an olefin polymer containing from about 35% to about 85% polar comonomer consisting essentially of stirring said polymer in molten state in an aqueous dispersion system comprising an alkali metal soap and cooling the resulting hot dispersion with the polymer in the disperse state to below about 100° C., said dispersion being formed in the absence of discharge of the hot dispersion through a restricted orifice into a zone of reduced pressure, the particles comprising the cooled dispersion having an average diameter ranging from about 20 microns up to about 500 microns, with the majority of particles being less than 250 microns.
Claim 2
Dependent Claim
106 words
A process for dispersing an olefin polymer containing from about 35% to about 85% polar comonomer consisting essentially of stirring said polymer in molten state in an aqueous dispersion system comprising an alkali metal soap and cooling the resulting hot dispersion with the polymer in the disperse state to below about 100° C., said dispersion being formed in the absence of discharge of the hot dispersion through a restricted orifice into a zone of reduced pressure, the particles comprising the cooled dispersion having an average diameter ranging from about 20 microns up to about 500 microns, with the majority of particles being less than 250 microns.
Claim 3
Dependent Claim
27 words
A process according to claim 1 wherein said dispersion system comprises a soap of a saturated fatty acid of from about 10 to about 22 carbon atoms.
Claim 4
Dependent Claim
13 words
A process according to claim 1 wherein the polymer is an ethylene polymer.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein the polymer is an ethylene-vinyl acetate copolymer.
Claim 6
Dependent Claim
39 words
A process according to claim 1 wherein the weight ratio of polymer to water in said dispersion system is from about 0.1:1 to about 3:1, the weight ratio of soap to polymer is from about 0.01:1 to about 0.3:1.
Claim 7
Dependent Claim
114 words
A process for dispersing an olefin polymer containing from about 35% to about 85% polar comonomer consisting essentially of stirring said polymer in molten state in an aqueous dispersion system comprising an alkali metal soap in the presence of a free radical inhibitor and cooling the resulting hot dispersion with the polymer in the disperse state to below about 100° C., said dispersion being formed in the absence of discharge of the hot dispersion through a restricted orifice into a zone of reduced pressure, the particles comprising the cooled dispersion having an average diameter ranging from about 20 microns up to about 500 microns, with the majority of particles being less than 250 microns.
Claim 8
Dependent Claim
114 words
A process for dispersing an olefin polymer containing from about 35% to about 85% polar comonomer consisting essentially of stirring said polymer in molten state in an aqueous dispersion system comprising an alkali metal soap in the presence of a free radical inhibitor and cooling the resulting hot dispersion with the polymer in the disperse state to below about 100° C., said dispersion being formed in the absence of discharge of the hot dispersion through a restricted orifice into a zone of reduced pressure, the particles comprising the cooled dispersion having an average diameter ranging from about 20 microns up to about 500 microns, with the majority of particles being less than 250 microns.
Claim 9
Dependent Claim
27 words
A process according to claim 6 wherein said dispersion system comprises a soap of a saturated fatty acid of from about 10 to about 22 carbon atoms.
Claim 10
Dependent Claim
14 words
A process according to claim 6 wherein said soap comprises an alkali metal stearate.
Claim 11
Dependent Claim
13 words
A process according to claim 6 wherein said polymer is an ethylene polymer.
Claim 12
Dependent Claim
14 words
A process according to claim 6 wherein said polymer comprising an ethylene-vinyl acetate copolymer.
References Cited (Backward Citations)
US2653919A
Cited
US3586654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |